Lard-cooler



(No Modem 3 Sheets-Sheet 1. 0. G. BURNHAM.

LARD COOLER.

' Patented Deo. 11, 1883.

(No Model.)

LARD COOLER.

Patented Dac. Il, 1889;.-

rev..

` N. PETERS. Pham-mnugnphw. wnsmngmn. D. c.

(No Modem l s sheensL-sheen 3.

0. G. .BURNHAM.

VLARID COOLER.

N-O.- 289,809. Patented Deo. 11, 1.883.

NVENTCJ UNI-ren STATES ,PATENT Y Prion.

OLIVER G. BURNHAM, OF CHICAGO, ILLINOIS.

LARD-COOLER.

SPECIFICATION forming part of Letters Patent No. 289,809, dated December11, 1883.

Application filed November 20, 1882. (No model.) y

LTO all 1071.077?, it may concern.:

Be it known that I, OLIVER G. BURNHAM, of Chicago, in the county of Cookand State of Illinois, have invented certain new and useful Improvementsin Lard-Coolers; and I do hereby declare that the following is a full,clear, and exact description thereof, reference being had to theaccompanying drawings, and to 'the letters of reference marked thereon,which form apart of this specification.

This invention relates to devices for cooling lard and similarsubstances; and it consists in the several matters hereinafter setforth, and pointed out in the appended claims.

The object of the invention is to provide means for facilitating thepassage of the lard or other substance to be cooled throughathin space,in which it is exposed to one or more cooling-surfaces.

In the machine illustrated in the drawings, and embodying my invention,the thin space through which the lard is passed, and within which it iscooled, is annular, and is obtained by the arrangement of one metalcylinder within another and slightly larger cylinder, and the cooling iseffected by cold water acting through both cylinders. The desiredmovement of the lard through the cooling-space is obtained by means of aforce-pump, and is facilitated by an arrangement of the cylinders in avertical position and an oscillating motion of the inner cylinder, theseveral proximate surfaces of the cylinders being provided withprojecting strips, which bear upon the surfaces of the oppositecylinders. By these means a successful operation of the apparatus iseffected with a cooling-space much thinner than has heretofore beenemployed, and with consequently better results.

In the drawings, Figure lis a side elevation of the machine. Fig. 2 is acentral vertical section. Fig. 3 is a top view. Fig. 4 is a horizontalsection of the inner cylinder through x x of Fig. 2. Fig. 5 is ahorizontal section through y y of Fig. 2. Fig. 6 is a fragment of one ofthe bearing-strips detached.

A is a metal cylinder, which sets in a vertical position on a suitablebed-plate, A4, riveted or otherwise permanently secured thereto. B is asecond metal cylinder, mounted within and concentric with the cylinderA.

The cylinder B is of exterior diameter somewhat less than the interiordiameter of the cylinder A, so as to leave a thin annular space, b,between the two.

B is a close bottom of the cylinder B, provided with a central gudgeon,b', which passes through a stuffing-box, a, in the bottom plate A4, andrests on a step, A5, secured to the latter. Said gudgeon may, however,be seated in a recess of the bottom plate.

B2 is a close ;top affixed to the cylinder B, having a central neck orhollow shaft or gudgeon, B3,which passes through a suitable bearing, A3,in the close top plate, A2, affixed to the top of the cylinder A. Thecylinder B is shorter than thecylinder A, so as to afford a considerablespace, A, between the bottom plates, B and A4, or beneath the cylinderB, as seen in Fig. 2. The top of the inner cylinder is also considerablybelow the top of the outer one, so that ample room is afforded for theof a mass of substance to be cooled within the upper walls of the outercylinder and between the top plates of the two cylinders.

A7 is an inner pipe in the plate A3, connected with a pump for forcingthe lard into the space between the cylinders. n

Ais a cylinder surrounding the cylinderA, at some little distancetherefrom, affording a chamber, c, for water or other cooling agent. Iis an inlet-pipe for conducting water to said, chamber c, near thebottom, and O is an outlet near the top thereof, to conductthe warmerportion of the water away. The inner cylinder, B, is also provided withan inlet-pipe, I', and an outlet-pipe, O, arranged to respect ivelydeliver at the bottom and discharge at the top.

As a means of securing the .pipes I and O, the upper end of the gudgeonB:i is cast solid for a suitabledistance to admit of the pipes beingthreaded into the same, as shown in Fig. 2. The plate AAlt is providedwith an opening, with which is connected a pipe, c3, havingua gate orvalve, at, which may be opened more admission or less to deliver thestock with such rapidity as to insure its proper temperature.

As a means of oscillating the inner cylinder, B, the upper protrudingend of the gudgeon B3 is provided with a crank-arm, E, which may bevibrated by any suitable connection for the Ioo/ .3 ceases the thinpassage b, the proximate surfaces ofy the cylinders are made smooth, andeach is provided with projecting strips C C, which bear against thesurface of the opposite cylinder. Said strips are usually and preferablyof wood, and are set in continuous vertical rccesses in the sur-face ofeither cylinder, as

plainly seen in the horizontal sections of-y the drawings. Onv theirlbearing surfaces said strips are transversely and obliquelynotehed atVc, and'. they aremade to bear. outwardly against.` the opposite cylinderby means of springs C, Fig. 6, arranged beneath .the strips, and`preferably secured thereto. Usually four strips will' be set. ineachcylinder, and those ofthe cylinder B will be placedin alternationwith` or betweenthose of. the cylinder A. In theoscillatory movement of.the cylinder; B, the bearing-strips G thereofwill be carriedfroinapoint. near one strip of cylinderA to a point. near anadjacentstrip on said cylinder. In other words, Athe bearingstripsof one cylfinder. will'sweep the surface ofthe other cylinder. nearly, or quite theentire distance be-` tween. its strips. In this operation, the substance cooled-upon the severalcylinders is dis'placedor scraped'off,and=particularly the thin film in immediate contact with. the cylinfders,which.will usually be cooledto hardness. Under the continued-actionof the pump `and Scrapers, adownwardrmovement of the mass is maintained.toward. the chamber. A6 and through the outlet ci, as described. Thetransverse grooves .or notches c c in the bearingfaces ofthe stripsallow the hard lard to pass, to some extent, from one -side to the otherof the several strips, so that. no violence is done to them when one setis brought forcibly into proximity with the other. In the generalmovement of. the lard or otherv stock being cooled, the mass isconstantly commingled, so as to havea uniform temperature andconsistency. The springs G cause the strips C to bear constantly againstthe opposing cylindert-face, even ifthe cylinders are not` perfectlyconcentric, and also serve to provide for. the wear of said strips,arising from friction thereof. with the opposing surface.

It is intended thatv a constant flow of water shall'..be maintained'through thc chamber a, andthroughthe inlet ,and outlet pipes If and Ofofthe inner cylinder. 'Io permit the oscilf lationof the cylinder B, thepipes I and O may obviously be connected eXteriorly. with fiexibletubes.

Vhile the outer cylinder is shown, and will always preferably be thestationary cylinder and' the inner one the oscillating' or movable one,this order may be reversed without departure from my invention. rlhedesirable chamber or space A at the bottom, constituting a sort ofcollecting-reservoir intervening between the annular space b and theoutlet a,

.may also be otherwise provided than in the manner shown-as, forexample, by an annular enlargement of the outer, or by a similarcontraction of the inner, cylinder at the bottom. Of course, if thoughtsufficient, but one 'of-the cylinder-surfaces need be cooled by the.application of water or other means, as shown.

I am aware that coolers have heretofore been constructed in lwhich thelard or other material to be cooled is placed in the space between twoconcentric cylindrical cooling-surfaces,

and I amalso aware that revolving Scrapers have been used for. removingthe solidified material from the surfaces of such cylinders. I do nottherefore claim either of such devices, broadly; but my invention islimited to the matters 4set forth in the-following claims:

I claim. as my invention- 1. A lard-cooler consisting, essentially, ofouter and inner cooling-cylinders having their proximatecooling-surfaces separated by a thin space, means for forcing the lardthrough such space, and means for clearing the cooling-surfaces,substantially as described.

2. In combinationwith an outer coolingcylinder having inlet and outletpassages at top and bottom, an inner coolingcylinder of dimensionsaffording spaces at. its opposite ends, and a thin space between theadjacent cylindr-ic surfaces, means for oscillating the inner cylinder,and means operated` by the movement of the said inner cylinder forclearing the surfaces of both cylinders, substantially as described.

3. The combination, with the outer and inner. smooth-surfaced cylinders,A and B, con centrically arranged, as shown, of bearingstrips C, securedalternately to the opposite cylinders, and means for oscillating one ofthe cylinders, substantially as described.

4. In combination with the cylinders arranged and operating as setforth, andprovided with longitudinal recesses in their proximate faces,strips C, having transverse notches c, and springs C', arranged beneath4the strips, substantially as described.

In testimony that I claim theforegoing as my invention I affix mysignaturein presence of two witnesses.

OLIVER G. BURNHAM- Vitnesscs:

M. E. DAYTON, PETER J. ELLERT.

IOO

